<div class="bulletin">
  <div style="float:left;padding:4px;">
    <%= avatar_for user, "large" %>
  </div>
  <p><span class="tip">blog:</span> <%= link_to user.blog_url, user.blog_url %><br />
     <span class="tip">自我介绍：<%= user.bio_html %></span></p>
</div>